Window.



wiLnnLM-msermaaion BERniNA, GERMANY.`

`WIN Dow.

SPECIFICATION 4forming pant of Letters Patent ivo. @accederse Mann 1"?, 19103.

To a/ZZ whom toot-ay c'ortcerztr 1 y Be it known that I, WILHELM SCHAAR, a

subject of the King of Prussia, German `Emperor, residing at 39`Chausseestrasse, inhe city of Berlin,King`dom of Prussia, and German Empire, haveinvented a certain newand useful Improvement in"Wind'ows,rof which the following is a specification, such as will enable others skilled in the art to which it appertains to make and use the same. f

The object of my invention isto provide a .window the sash of which is so hung and secured in the frame that the same may belowered down into the cavity beneath the sill of the window-frame and to such ends the same consists, in substance, of a plurality of sashes provided with any suitable number of glass panes hinged at the sides in a sliding frame' slidingly mounted in the main frame of the Window and a 'counterbalance weight or weights for the sliding frame, the main frame having pivoted therein a vibrating sill or tightening-plate adapted when thewindowis fully raised to close the opening of the sill-cavity,

through which the device is loweredinto theA wall, and to permit the window to pass by the same when pushed downward, one of the side pieces of the sliding frame being provided with a rack-bar and the pivotof the vibrating sill or tightening plate with a pinion meshing therewith to brin gabout such movement. i

Said invention is fully shown and described in the following specification, ofwhich 'the4 accompanying drawings forma part, wherein similar letters of `reference designate like or equivalent parts wherever found throughout the several views, and in Which- Figure l is a front View in elevation of 'my' improved form of window in the closed posi- Application filed `July 1,-1902i Serial Noi113|979. (No model.)

detail View, on a `still larger scale, partially in section and partiallyindotted lines, of the mechanism for actuating such sill or tightening-plate.

Referring to the drawings, the window proper consists of the side` sections having the panes a a and hinged at the sides to the side pieces of the slide-frame, as shown in Figf, so as to beswungout upon such hinges 6o in the same manner as a doorthe slide-frame reciprocating up and -down in the main frame when the sashes are shut and secu red in place therein, this reci procation being facilitated by a counterbalance-weight c, secured thereto in the well-known manner by a cord-and-pulley arrangement, the weight c being concealed in a cavity of the main frame, as shown in Figs. 2 and 6.

Pivoted at either end in the .main frame 7o and extending horizontally across the same just below the rear edge of the stationary silk d is a vibratingsill or tightening-plate d, usually of the elongated S or reversed curve shown in Figs. 3 and 4lE and more plainly in 75 dotte'dlines in Fig. 7, one ofthe pivot-pins g of which is provided with a pinion h, mesh ing with a rack'bar i, which is rigidly secured to, and the teeth of which project outward from, the side bar of the `sliding frame b, and 8o by the coaction of such pinion and rack-bar it will be seen that the' sillortightening-plate d will upon thelast portion of the upward movementof the sliding frame b be vibrated into the position shownin Fig. 3, so as to close the frame-receiving cavity by contact on the outer edge with the top of the rear portion of i the sill and by contact on the inner side with the bottom edge of the slidingr frame, and that the instant the sliding frame is pushed down- 9o ward in the main frame such plate d will be vibrated into the open position, (shown in Fig. 4,) so as to permit the passage down by the sanne of such frame b, the rack-bare' being of just suflicient length to bring about such movement and no more as the sliding frame passes down into the cavity e, and it will be seen that when closed the jointis made tight against wind and rain by reason'of the curved shape in crosssection of such plate (Zand by Ioo the coaction therewith of a groove in the bottom of the sliding frame b and the ridge-like projection f ofthe outer portion of the sill of the main frame. Y

In order to be able to effect even extensive repairs of the improved sash-window without difculty and with a view to rigidly secure the sash-window in any position desired and to effect an absolute tight closing of the joint 'between the slide-frame and the Windowframe, even against the pressure of a strong wind blowing against the Window, the guides 7c for the slide-frame b are connected to the main window-frame by hinges Z. These guides k are ordinarily secured in their normal position by screw-buttons m, which are screwed into the narrow partition n, Fig. 6,and through the said guides 7c. The partition n, which separates the space for the counterweight c from the slide-frameb, is of such Width that when the screws m are tightened the guides 7c are pressed tightly against the slide-frame b, thereby preventing displacement of the latter and securing a tight joint and a perfect closing of the latter, the wind being thereby prevented from entering at the slide-frame, such screws being of course loosened when it is desired to reciprocate the slide-frame. If the screws m are taken out from the guides 7c or if they are sufficiently screwed back into f the said guide to become disengaged from the Y cured to the plate, and a rack-bar adapted to engage with the pinion,substantially as shown and described.

2. The combination with a main windowframe provided with a sill-cavity dividing the sill thereof into an outer and an inner portion, of a sliding frame mounted in the main frame so as to be capable of vertical reciprocation in and out of the sill-cavity, an S- shaped sill closing or tightening plate pivoted at,the ends in the main frame adjacent to the v sill adapted when substantially horizontal to contact with the bottom of the sliding frame on the inner side and with the top of the sill on the outer side, a pinion secured to the plate, and a rack-bar secured to the sliding .frame adapted 'to coact with the pinion so as so as to be capable of vertical reciprocation in and out of the sill-cavity, a counterbalance-weight in actuating connection with the sliding frame, anl S-shapedsill closing or tightening plate pivoted at the ends in the main frame adjacent to the sill adapted when substantially horizontal to contact with the bottom of the sliding frame on the inner side and with the top of the sill on the outer side, a. pinion secured to the plate, and a rack-bar secured to the sliding frame adapted to coact With the pinion so as to vibrate the sill or tightening-plate, substantially as shown and described.

In Witness whereof I have hereunto set my hand in presence of two witnesses.

WILHELM SCHAAR.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

